Smiths MA cable driven 2:1 ratio rev counter from a Jaguar Mk5 (1950 to 51, same as RN 7455/09) I believe but please double check exact fitment, Smiths number on the face is X.70718/1. The instrument has been 'fully' stripped, all mechanical parts have been ultrasonically cleaned/inspected and any worn/damaged parts replaced where necessary. The casing has been blasted, bezel repainted and the glass replaced. It has also been bench tested and recalibrated (including remagnetizing the magnet as appropriate) so I can confirm it works correctly. All in excellent condition.